duratech chimney 5"-8"

DURATECH CHIMNEY
5"-8" DIAMETER
INSTALLATION INSTRUCTIONS
MH7399
A MAJOR CAUSE OF CHIMNEY RELATED FIRES IS FAILURE
TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES) TO
COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST IMPORTANCE THAT THIS CHIMNEY BE INSTALLED ONLY IN
ACCORDANCE WITH THESE INSTRUCTIONS.
Read through all these instructions before beginning your installation. Failure
to install the chimney as described in these instructions will void the manufacturer’s
warranty and may have an effect on your homeowner insurance and UL listing
status. Keep these instructions for future use.
CONTENTS
CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PERMITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DURATECH CHIMNEY APPLICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
EQUIPMENT & MATERIALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION NOTES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHIMNEY DIAMETER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHIMNEY HEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHIMNEY PLACEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CHIMNEY ENCLOSURE REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
STOVE RECOMMENDATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STEP-BY-STEP DIRECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CEILING SUPPORTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OFFSET ELBOW INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
EXTENDED ROOF BRACKET INSTALLATION . . . . . . . . . . . . . . . . . . . . . . 11
ROOF SUPPORTED INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TEE-SUPPORTED INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MASONRY FIREPLACE INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 21
ZERO-CLEARANCE FIREPLACE INSTALLATIONS . . . . . . . . . . . . . . . . . 22
CONNECTION FROM APPLIANCE TO CHIMNEY SYSTEM . . . . . . . . . . . 22
CHIMNEY MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
CLEARANCES
Always allow at least a 2-inch clearance between DuraTech Chimney Pipe and
any combustible materials. Never fill any required clearance space with
insulation or any other materials. Combustible materials include lumber,
plywood, sheetrock, plaster and lath, furniture, curtains, electrical wiring and
building insulation. Keep single wall stovepipe at least 18 inches away from
combustible materials, unless a clearance reduction system that is acceptable
to the authority having jurisdiction is used, or the appliance to be installed is
listed and the instructions specify a different clearance.
PERMITS
Contact your local Building Official or Fire Official regarding permits, restrictions,
and installation inspections in your area.
DURATECH CHIMNEY APPLICATIONS
DuraTech Chimney is a complete chimney system tested and listed to UL 103
HT for the United States, and ULC S604 in Canada. In the U.S., DuraTech
Chimney can be used with wood stoves, fireplaces, fireboxes, furnaces, boilers,
water heaters, stoves, ranges, or other residential-type appliances fueled by oil,
gas, coal, or wood, that require a UL103 HT chimney system. In Canada,
DuraTech can be used with oil & gas fired appliances listed for use with a Type
A Chimney, in accordance with ULC S604 (DuraTech has not been approved
for use with solid fuel appliances in Canada). DuraTech Chimney is available in
5", 6", 7" & 8" diameters (UL 103 HT Rated), as well as 10", 12", 14" & 16"
diameters (UL 103 Rated). Do not use with forced draft, positive-pressure
appliances. The DuraTech Chimney system may have a maximum of two (2)
offsets (four elbows total) of 30° from vertical. DuraTech Chimney is listed under
UL Re-examination Service Number MH7399.
EQUIPMENT & MATERIALS
Hammer
Caulking Gun
Screwdrivers (Phillips & Standard)
Saber or Keyhole Saw
Dependable Ladder
Proper Gloves and Shoes
Drill
Plumb Bob
Tin Snips
Level
Tape Measure
Eye Protection
Materials You May Need:
500OF RTV Silicone Sealant
#8, 2-1/2" & 1-1/2" Wood Screws
8 Penny Nails
Roofing Nails
2
INSTALLATION NOTES
Proper planning for your DuraTech Chimney installation will result in greater safety,
efficiency, and convenience, as well as saving time and money. You must use only
authorized DuraTech Chimney parts to maintain a listed Chimney system (not
including the connector pipe). Do not mix parts or try to match with other products,
or use improvised solutions. Do not install damaged or modified parts. Table 1 lists
the authorized DuraTech Chimney components. Practice good workmanship.
Sloppy work could jeopardize your chimney’s safety. Keep electrical wiring and
insulation away from all chimneys and stovepipes. If you have any questions, be
sure to contact either your dealer or Simpson Dura-Vent directly.
Table 1: DuraTech Chimney Components
Part
Part
6", 12", 18", 24", 36" & 48" Pipe Sections
Firestop Radiation Shield
Elbow with swivel
Attic Insulation Shield
Tee with Tee Cap
Elbow Strap
Adjustable Tee Support Bracket
Adjustable Wall Strap
Chimney Cap
Anchor Plate
Round Ceiling Support Box
Extended Roof Bracket
Trim collars for Round Support Boxes
Adjustable Roof Flashing
Square Ceiling Support Box
Chase Top Flashing
Flat Ceiling Support Box
Flat Roof Flashing
Roof Support
Storm Collar
Trim collar for Roof Support
Transition Anchor Plate
Wall Thimble
Base Tee and Double Base Tee
Finishing Collar
Firestop
CHIMNEY DIAMETER
Follow the appliance manufacturer’s instructions to determine chimney diameter
and clearances between combustible materials and your heating appliance. Never
choose a chimney with an inside diameter smaller than your appliance's outlet. To
calculate the chimney’s outside diameter, add 2 inches to the inside diameter.
CHIMNEY HEIGHT
The National Fire Protection Association Standard #211 states: “Chimneys shall
extend at least three feet above the highest point where it passes through the roof
of a building, and at least two feet higher than any portion of a building within
ten feet.” (Fig 1) DuraTech Chimney may be installed up to 60 feet high. If the
chimney extends more than 5 feet above the roof, an Extended Roof Bracket must
3
be used (see page 12). Due to the overlap of
the joints, subtract 1-1/4 inches from each
Chimney Section’s height to calculate installed height.
2 FT. MIN. ABOVE
HIGHEST POINT OF
ROOF WITHIN 10 FT.
10'
3 FT. MIN.
ABOVE ROOF
CHIMNEY PLACEMENT
Fig 1
When deciding the location of your chimney,
try to avoid modifications to roof beams and other structural components of the
building.
CHIMNEY ENCLOSURE REQUIREMENTS
Through Rooms: Interior chimneys shall be enclosed where they extend
through closets, storage areas, occupied spaces, or anyplace where the surface
of the chimney could be contacted by persons or combustible materials. The
space between the outer wall of the chimney and the enclosure shall be at least
2 inches (Fig 2).
Multi-Story: Consult local building codes for requirements in your area. In the
U.S., the National Fire Protection Association Standard #211 states: "Factorybuilt chimneys that pass through floors of buildings requiring the protection of
vertical openings shall be enclosed with approved walls having a fire resistance rating of not
less than one hour when such chimneys are
located in a building less than 4 stories in height,
and not less than 2 hours when such chimneys are
ATTIC
located in a building more than 4 stories in height."
INSULATION
SHIELD
In Canada, except in single-family and two- ATTIC
SPACE
family dwellings, chimneys which extend through
another story must have an enclosure with a fire
FIRESTOP
RADIATION
resistance rating equal to or greater than that of
SHIELD
(INSIDE)
OCCUPIED
the floor or roof assembly through which they SECOND
FLOOR
pass.
Cold Climates: In cold climates, chimneys
ENCLOSURE
MUST HAVE 2
mounted on an outside wall should be enclosed in
INCHES OF
CLEARANCE
a chase. Exterior chases reduce condensation
BETWEEN
CHIMNEY AND
and creosote formation, and enhance draft. InWALL
clude an access door by the Tee Cap for chimney FIRST
SUPPORT BOX
FLOOR
cleaning (Refer to Fig 23, page 17).
Fig 2
4
STOVE RECOMMENDATIONS
Follow the stove manufacturer’s instructions. The requirements stated below
pertain to all stoves or other appliances installed with DuraTech Chimney systems.
Choice: Choose an appliance that is listed by a recognized testing laboratory, is
appropriate for your needs, and is not larger than required.
Installation: Once the chimney system is in place, install the stovepipe to
connect the appliance to the chimney as described in the appliance manufacturer’s
instructions. Be sure to maintain all required clearances.
Flues: Connect only one solid fuel appliance per chimney.
Operation: Follow the appliance manufacturer’s instructions for maximum efficiency and safety. Overfiring can damage the appliance, stovepipe and chimney.
Fuels: Do not burn driftwood, plastic, or chemically treated wood such as railroad
ties. They are corrosive to your appliance, stovepipe and chimney. Follow the
appliance manufacturer’s instructions and safety manual in regards to fuels. Not all
appliances are equipped to burn coal. Coal with a low sulfur content will reduce
the possibility of corrosion.
Mobile Homes: Please read the appliance manufacturer’s instructions and safety
manual carefully. Not all appliances are listed for use in mobile homes.
STEP-BY-STEP DIRECTIONS
There are five general types of DuraTech Chimney installations:
1. Ceiling-supported
2. Roof-supported
3. Tee-supported (through-the-wall) 4. Masonry Fireplace
5. Zero-Clearance Fireplace
Review the step-by-step directions before beginning your installation.
CEILING SUPPORTED
1. Place Appliance: Position the appliance according to the manufacturer’s
instructions. The flue outlet collar should be placed between the rafters or joists
above, if possible.
2. Frame Support Opening: Drop a plumb bob to the center of the appliance’s
flue outlet and mark this center point on the ceiling. Refer to Table 2 for specific
framing and clearance dimensions. Mark appropriate cutting lines around the
center point. Cut a square hole in the ceiling for the Support Box. Frame a level,
square opening centered over the hole which you have cut. (Figures 3 and 4).
3. Install Support: For installation into a flat ceiling, you may use either the Round
Support Box, the Flat Ceiling Support Box, or the Square Ceiling Support Box. The
5
CHIMNEY
CAP
ADJUSTABLE
FLASHING
STORM
COLLAR
CHIMNEY
SECTIONS
ATTIC
INSULATION
SHIELD
MINIMUM OF 3
INCHES BELOW
FINISHED CEILING
18 INCHES MINIMUM
FOR SINGLE-WALL
STOVEPIPE
FRAMED
OPENING
ROUND
SUPPORT BOX
ROUND TRIM
COLLAR
Fig 3
Flat Ceiling Support Box is primarily used for Oil Appliances and comes unpainted.
For the Square Ceiling Support Box, refer to the Square ceiling installation below.
The Round Ceiling Support Box has the option of a square or round Trim Collar
available (Fig 5). The bottom of the Round Support Box must extend at least 3
inches below the finished ceiling. Level the Support Box and secure it to the framing
using at least three 8-penny nails per side (min. of 12 total). Alternatively, you may
use 1-1/2" #8 wood screws (min. of 12 total), instead of nails. Next, secure the Trim
Collar (round or square) to the framing members using the (4) 1" long, round-head
wood screws provided (Fig 6).
For installation into a cathedral ceiling, you must use the Square Ceiling Support
Box and the two-piece Trim. The bottom of the square portion of the Support Box
must be a minimum of 2-inches lower (round portion is an additional 3 inches lower)
than the finished ceiling at the lowest side of the penetration (Fig 5 & 6). Level the
Support Box and secure it to the framing using
JOISTS &
FRAMING
at least three (3) 8-penny nails per side (minimum
of 12 nails total), or a minimum of (3) #8, 1-1/
2" wood screws. Adjust the overlapping "Ushaped" Trim pieces so they cover the Support
3-INCH MINIMUM
REQUIRED BELOW Box, and secure them to the framing members
Fig 4
FINISHED CEILING
6
3 INCHES MIN
BELOW
FINISHED
CEILING
ROUND SUPPORT BOX
WITH SQUARE TRIM
COLLAR
Fig 5
ROUND SUPPORT BOX
WITH ROUND TRIM
COLLAR
using the (6) 1-1/4" long, round head wood screws provided (see Fig 6).
4. Frame Openings: Frame openings in each ceiling or floor above the Support
Box (Fig 7). These openings are to hold the Firestop Radiation Shield and Attic
Insulation Shield. Locate each opening by dropping a plumb bob to the four
corners of the opening below. Maintain the minimum clearances and dimensions as specified in Table 2. If Elbows must be used to avoid an obstruction,
refer to the Offset Elbow Installation section.
5. Cut Roof Opening: Cut an opening in the roof directly above the opening
below, and at least 4 inches larger than the chimney’s outside diameter to
provide at least a 2-inch clearance all around the chimney. The chimney must
be centered within this opening and maintain the 2-inch clearance to combustibles.
6. Install Firestop Radiation Shield: A Firestop Radiation Shield is required
in multistory installations at each floor penetration above that where the Support
Box is located. Example: in a multistory home where the appliance is on the ground
floor (Support Box is in the 1st floor ceiling), you would need a Firestop Radiation
Shield at the 2nd floor ceiling, and at the 3rd floor ceiling, etc., including where the
chimney penetrates into the attic. Figure 7 shows a typical 2-story installation with
an attic. Note: a Firestop Radiation Shield is not installed where the chimney
penetrates through the roof. The Firestop Radiation Shield is installed on the
underside of the ceiling/floor framing, with the cylindrical "tube" portion of the shield
Fig 6
SQUARE CEILING
SUPPORT BOX WITH
TRIM FRAME IN
PLACE
ROUND CEILING
SUPPORT WITH
TRIM IN PLACE
MINIMUM OF 2
INCHES BELOW
FINISHED
CEILING
WOOD SCREWS
ARE REQUIRED
WOOD SCREWS
ARE REQUIRED
7
pointing upward (Fig 8). Use a
minimum of either (1) 8 penny nail
or (1) #8, 1-1/2" wood screws per
corner. Refer to Table 2 for framing
requirements.
7. Assemble Chimney Sections:
Lower the female end of the first
Chimney Section in the Support
Box (Fig 9). It will twist-lock
clockwise onto the male end of the
Support Box. Turn Pipe Sections
firmly clockwise to lock them together. Sheet metal screws are not
required, but they may be used to
reinforce the connection, if desired.
Use only 1/2" (or shorter) sheet
metal screws. Do not penetrate the
inner liner of the chimney.
8. Install Attic Insulation Shield:
Install the Attic Insulation Shield
where the chimney passes into an
attic. It’s purpose is to prevent
debris and insulation from getting
too close to the chimney (Fig 10).
An installed Attic Insulation Shield
is 15 inches high. In attic areas
where this shield cannot fit, you
must enclose the attic portion of the
chimney in a framed enclosure. If
the chimney is fully enclosed through
the attic, an Attic Insulation Shield
is not required. If the chimney
passes into the attic, install the Attic
Insulation Shield as follows:
a. If the Firestop Radiation Shield
extends above the attic floor, no
modifications are necessary. The
Table 2
CAP
STORM
COLLAR
ADJUSTABLE
FLASHING
CHIMNEY
SECTION
2 INCH MINIMUM
CLEARANCE TO
INSIDE OF
ENCLOSURE
ATTIC
INSULATION
SHIELD
FRAMED
ENCLOSURE
FIRESTOP
RADIATION
SHIELD
MINIMUM OF 3
INCHES BELOW
FINSHED CEILING
CHIMNEY
SECTION
18 INCH MINIMUM
FOR SINGLE WALL
STOVEPIPE
FRAMED
OPENING
ROUND
SUPPORT BOX
Fig 7
8
Firestop Radiation Shield will fit inside the Attic Insulation
Shield.
FRAMING
b. Assemble Chimney Sections until at least 18 inches of
chimney extends above the Firestop Radiation Shield.
c. Extend the Firestop Radiation Shield tube extension
(keep at least 1" overlap), and secure in place using sheet
FIRESTOP
RADIATION
metal screws.
SHIELD
d. Slip the Attic Insulation Shield over the Chimney and
Firestop Radiation Shield until the base sits squarely on
Fig 8
the framed opening (Fig 7 & 10).
e. Secure the Attic Insulation Shield to the top of the
framed opening using at least (3) 8-penny nails or (3) #8, 1-1/2" wood screws per
side (Fig 10).
f. Wrap the Collar of the Attic Insulation Shield around the chimney and fasten
it loosely. Slide the Collar down to meet the Attic Insulation Shield. Slip the tab
through the adjacent slot and fold it back to tighten and secure the Collar (Fig 11).
9. Attach Flashing: In new construction, assemble the Chimney Sections to a
point above the roof, then slip the Flashing over the chimney. On an existing roof,
center and install the Flashing before extending the chimney above the roof. Allow
space to permit sliding the next Chimney Section up through the Flashing. Always
insure the chimney remains vertical (use level), and that at least a 2-inch clearance
to combustible materials is maintained all around. Install the upper edge of the
Flashing under the roofing. Nail to the roof along the upper edge and down each
side with 1-inch roofing nails. Do not nail the lower edge of the Flashing (Fig 12).
Be sure to follow local building practices, as needed. Seal all nail heads with a nonhardening waterproof sealant. On flat or tarred and graveled roofs, nail and seal
the Flat Roof Flashing to the roof on all sides with roofing compound. Do not put
screws through the Flashing into the Chimney Pipe.
10. Finish Top: Apply a high-temperature (500OF), non-hardening waterproof
TWIST
CLOCKWISE
TO TIGHTEN
ATTIC
INSULATION
SHIELD
ROUND
Fig 9
Fig 10
9
sealant around the chimney at the point where the Storm
Collar will meet the chimney just above the Flashing.
(Figures 12 and 13). Slide the Storm Collar down over the
chimney to the top of the Flashing. Tighten and seal the
Storm Collar against the sealant. After installing sufficient
Chimney Sections to meet the height requirement (Fig 1),
attach the Chimney Cap onto the top of the chimney by
Fig 11
holding the collar of the cap and twist locking it clockwise
onto the chimney. Do not hold upper portion of the cap and twist, as this may
damage the cap. The Chimney Cap can be removed for chimney cleaning as
described in the Chimney Maintenance section of the instructions. Use an Extended
Roof Bracket if the chimney extends more than 5 feet above the roof. (Figures 16
& 17 in the Extended Roof Bracket section). If you are located in heavy snow
country, it is recommended that a "splitter" be installed, and should be fabricated
from heavy gauge sheet metal (Fig 14). This will protect the chimney by routing the
snow around it. This item is not furnished by Simpson Dura-Vent.
11. Enclosures: Enclose chimneys where they pass through occupied spaces,
including closets. Always maintain at least a 2 inch clearance between the chimney
and any combustible materials. Interior enclosures may be constructed with
standard framing and sheathed with sheetrock or plywood. Use Wall Straps as
needed to maintain a minimum of 2 inches of air space between the chimney and
combustible materials.
ROOFING
FASTENERS
Fig 12
Fig 13
PUSH COLLAR
DOWN TO
FLASHING AND
SEAL WITH NONHARDENING HIGHTEMP SILICONE
SEALANT
ADJUSTABLE
FLASHING
OFFSET ELBOW INSTALLATION
Elbows are manufactured in 15° and 30° angles measured from the vertical. A 30°
Elbow is the largest that can be used in an offset. A 30° Elbow may not be combined
with a 15° Elbow to make a 45° offset. Avoid Elbows if possible, since a totally
vertical chimney is more efficient. When Elbows are necessary to avoid obstructions such as rafters, ridgepoles, or joists, use no more than 2 pairs of Elbows in any
one chimney system.
10
1. Attach Elbows: Attach Elbow to Chimney
Section or other Elbow by twisting clockwise until
they lock firmly. Attach one Elbow to the Chimney
Section below, and align it for the offset. Elbows for
DuraTech have a swivel feature that allow for 360O
rotation for ease of installation. Refer to Table 3 to
SPLITTER
determine the required offset length and attach an
appropriate length (or lengths) of Chimney
Section(s) above the Elbow. The maximum length
TOP
of chimney pipe between elbows is not to exceed
VIEW
72" (maximum of two chimney sections only).
Attach the second Elbow above the Chimney SecFig 14
tion to complete the offset (Fig 15).
2. Secure Offset: Place the Elbow Strap’s band around the angled portion of the
top Elbow, then tighten the nut and bolt until the clamp is firm. Wrap the Elbow
Strap end over an adjacent joist or rafter and secure it with at least (2) 8-penny nails
or (2) #8, 1-1/2 screws. Do not add more Chimney Sections until the Elbows are
supported. Be sure that the chimney remains vertical. If there is more than one
Chimney Section between the Elbows, install a second Elbow Strap around the
joint of the two Chimney Sections (Fig 15).
SPLITTER
ELBOW STRAP
ELBOW STRAP
ELBOW
SECOND ELBOW STRAP
REQUIRED WHEN TWO
CHIMNEY SECTIONS ARE
USED IN OFFSET
ELBOW
NOT MORE THAN 72
INCHES
(2 SECTIONS MAX)
RISE
(INCHES)
OFFSET
(INCHES)
CHIMNEY
SECTION
TWO CHIMNEY
SECTIONS
Fig 15
EXTENDED ROOF BRACKET INSTALLATION
If the chimney extends more than 5 feet above the roofline, an Extended Roof
11
TABLE 3
Bracket must be installed at every 5-foot inELBOW OFFSET CHART
crement of chimney height above the roofline,
leaving no more than 5 feet of chimney extending above the last pipe bracket. The Extended
Roof Bracket consists of the Pipe Band, the
Adjustable Legs, and the Roof Brackets.
1. Mount Pipe Band: Slip the Pipe Band
around the chimney and secure by tightening
the nut and bolt.
2. Attach the Legs: The Adjustable Legs of
the assembly will adjust from 67" to 114".
Secure one end of the Legs to the Pipe Band
using the nuts and bolts included (1 per Leg).
Position the Adjustable legs so they form approximately a 60° angle with the chimney, and
with each other (Figures 16 and 17). Be sure
that there is at least 3" of overlap between the
top and bottom halves of the Adjustable Leg.
In order to secure Legs in proper position,
there is a hole provided in the outer leg where
the outer and inner halves overlap. Use a 1/4"
drill bit to drill through the inner leg at that
location. Use the nut & bolt provided to pin the
Adjustable Legs in position.
3. Install Roof Brackets: Mount the two Roof Brackets where each of the
Adjustable Legs meets the roof, using (6) 1" roofing nails per bracket. Seal the nail
heads carefully with a non-hardening, waterproof sealant. Attach the bottom end
of the Adjustable Legs to the Roof Brackets using the nuts & bolts provided.
ROOF SUPPORTED INSTALLATIONS
There are two types of Roof Supported Installations: (1) Using a Square Ceiling
Support Box, and (2) Using a Roof Support.
(1) For a Square Ceiling Support Box installation, make sure that the square box
portion of the Support Box can extend at least 2" below the low side of the finished
ceiling (Fig 19). The Support Box must remain level, and the top edge of the box
must cover the edge of the roof’s decking material. Square Ceiling Support Boxes
are available in 11-inch, 24-inch, and 36-inch heights. Mobile home chimney
12
CHIMNEY
CAP
EXTENDED ROOF
BRACKET ASSEMBLY
PIPE BAND
AROUND
CHIMNEY
SECTION
ADJUSTIBLE
LEGS ADJUST
FROM 67 TO 114
INCHES
Fig 16
EXTENDED
ROOF BRACKET
MUST USE EXT.
ROOF BRACKET
IF OVER 5 FT.
ADJUSTABLE
LEGS
Fig 17
installations are roof supported. Do not seal openings in flashing.
1. Place Appliance: Place the appliance in its proper location, referring to the
manufacturer’s instructions as to allowable distances from combustibles, etc.
2. Cut Openings: Cut a roof opening in your desired location, just as in a CeilingSupported Installation (Steps 1 through 5, page 5). If a separate ceiling and roof
exists, as shown in Figure 18 (Low Attic), first cut and frame a ceiling opening as
described in Ceiling-Supported Installations (Step 2). Refer to Table 2 for
clearance and framing specifications. If it is desired to install through a cathedral
ceiling (Fig 19), then the hole is cut in the roof.
3. Install Support Box: Slip the Square Support Box into the framed opening so
the square portion projects at least 2 inches below the finished ceiling and rafters
(bottom of round portion is 5" below), and extends above the ceiling to framing or
decking materials that it can be nailed to. Level the Support Box, and slit the
corners to the roofline where they extend beyond it. Bend the flaps (created by the
slitting) flush with the roof, and nail the Support Box to the roof or framing with at
least three (3) 8-penny nails, or (3) 1-1/2", #8 screws, per side (Fig 20). Be sure
to keep the Support Box level. Screw the trim sections into the ceiling (Fig 6).
4. Complete Installation: Refer to Steps 7, 9 & 10 in the Ceiling Supported
Installation section to complete the Roof Supported installation.
(2) A Roof Support is also used in installations where there is a cathedral ceiling,
and a Square Ceiling Support is not desired. The Roof Support allows the
DuraTech chimney to come down into the room below the level of the ceiling (Fig
21). The Roof Support can support a maximum of 45 feet of DuraTech Chimney
total, and maximum of 20 feet below the support. If a taller stack of DuraTech
Chimney is required, you must use a Square Ceiling Support Box instead.
13
CHIMNEY CAP
ADJUSTABLE
FLASHING
STORM COLLAR
CHIMNEY
SECTION
CHIMNEY
SECTION
SQUARE PORTION OF
SUPPORT BOX NEEDS A
MINIMUM OF 2 INCHES
CLEARANCE TO
FINISHED CEILING
18 INCH MINIMUM
CLEARANCE FOR
SINGLE-WALL
STOVEPIPE
FRAMED
OPENING
SQUARE CEILING
SUPPORT BOX
Fig 18
CHIMNEY CAP
ADJUSTABLE
FLASHING
STORM COLLAR
SQUARE PORTION OF
SUPPORT BOX NEEDS
A MINIMUM OF 2
INCHES CLEARANCE
TO LOW SIDE OF
FINISHED CEILING
CHIMNEY
SECTION
CHIMNEY
SECTION
18 INCH MINIMUM
CLEARANCE FOR
SINGLE-WALL
STOVEPIPE
Fig 19
14
14
SQUARE
CEILING
SUPPORT BOX
1. Cut and frame opening to provide a minimum 2"
clearance on all sides of the chimney pipe. Note:
Opening in finished ceiling should be circular/oval in
order for it to be covered by Trim Collar.
2. Bolt on the Roof Support Brackets to the Roof
Support Band using the supplied hardware. Attach
the Roof Support Brackets to roof using (4) 8 penny
Fig 20
nails or (4) #8, 1-1/2" screws per side (Fig 21).
3. Determine how much DuraTech Chimney will be extending into the room
(minimum of 3" below the ceiling). Be sure to maintain the proper clearance to
combustibles (walls and ceilings) for the connector pipe. Once you have identified
the proper height for your installation, attach the of the Roof Support Band to the
Chimney Section by tightening the Bolt, and secure it by using (4) supplied sheet
metal screws.
4. Attach desired length of Chimney Sections above and below the roof level (max.
of 45' total, 20' below the support). To transition to the Connector Pipe, attach the
Finishing Collar by twist locking it to the bottom section of DuraTech Chimney.
5. Slide Trim Collar over the DuraTech Chimney and attach the Trim Collar to the
ceiling using (4) 1-1/4" screws provided (Fig 21).
6. Refer to Steps 10 & 11 in the Ceiling Supported Installation section (page 9)
to complete the Roof Supported installation.
Alternative Installation Location for Roof Support: The Roof Support may be
used at the bottom of a Chimney installation (Fig 22). This may be useful for some
USE 4 NAILS (OR
SCREWS) ON EACH
SIDE OF SUPPORT
TIGHTEN BOLT
ON ROOF
SUPPORT BAND
ROOF SUPPORT
(SUPPORT
BRACKETS
AND BAND)
ROOF SUPPORT
TRIM COLLAR
FINISHING
COLLAR
DURA-BLACK
SLIP CONNECTOR
SECURE ROOF
SUPPORT BAND
TO CHIMNEY
USING 4 SHEET
METAL SCREWS
Fig 21
15
OPENING IN ROOF
WITH MINIMUM 2"
CLEARANCE ON ALL
SIDES
DURATECH
basement installations. Maintain a miniCHIMNEY PIPE
mum of 2” clearance to combustibles at
ROOF
FLOORING
SUPPORT
all times. The DuraTech Chimney needs
to extend a minimum of 3” below the finished ceiling or exposed framing members.
Please note that you cannot extend the
chimney all the way to the appliance - you
FRAMING
MEMBERS
must have some connector pipe.
(ALL SIDES)
1. Cut and frame opening to provide a
minimum of 2" clearance on all sides of the
MINIMUM OF 3"
chimney. Be sure to maintain the proper
FIRESTOP
BELOW CEILING
OR EXPOSED
clearance to combustibles for the
FRAMING
connector pipe.
Fig 22
2. Bolt on the Roof Support Brackets to
the Roof Support Band using the supplied hardware. Attach the Roof Support
Brackets to floor using (4) 8 penny nails or (4) #8, 1-1/2" screws per side (Fig 22).
3. Determine how much DuraTech Chimney will be extending into the room
(minimum of 3" below the framing), and attach the of the Roof Support Band to the
Chimney Section by tightening the Bolt, and secure it by using (4) supplied sheet
metal screws (Fig 21 & 22).
4. Install the specialized Firestop below the finished ceiling or framing members.
The Firestop can only be used when installed with the Roof Support in this type of
installation. Use a standard Firestop Radiation Shield at all other locations.
5. Follow steps 4, 5 & 6 for the Roof Support Installation (page 15).
TEE-SUPPORTED INSTALLATIONS
Tee-Supported installations are used when passing through a wall to an outside
chimney. The Tee Support can hold a maximum of 60 feet of DuraTech Chimney.
The Tee Support and Wall Straps are adjustable, allowing from 2" - 6" of clearance
between the chimney and the wall, as needed to fit your installation. There are two
options when installing a Tee-Supported installation: the Tee Support above the
Tee, or the Tee Support below the Tee. The required parts and general
configuration are as shown in Figures 23, 24, 25 and 26.
1. Place Appliance: Position the appliance according to the manufacturer’s
instructions. It is a good idea to try to position the appliance so it will allow the
chimney to line up centered between studs.
2. Locate, Cut & Frame Opening: Determine the location where the chimney
16
will pass through the wall. The chimney MINIMUM 6 INCHES
CLEARANCE
should pass through the wall, centered BETWEEN CAP AND
CHASE TOP
CHASE TOP
FLASHING
between two studs. The height of the
penetration can be determined by positioning
sections of stove pipe until you have the
FRAMED
EXTERIOR
desired configuration (refer to the appliance
ENCLOSURE
manufacturer's installation instructions for
TYPICAL THRUrestrictions on stove pipe). Cut and frame an
THE-WALL TEE
SUPPORTED
opening in the inner and outer walls at this
INSTALLATION
location. Refer to Table 2 (page 8) for the
ACCESS
appropriate framing dimensions.
DOOR FOR
CLEANING
3. Install Wall Thimble: The Wall Thimble
is a three piece unit which includes the cover
Fig 23
plate, sleeve extension, and the back portion
with shield. On the outside wall, install the
back portion of the Wall Thimble. Center the back portion of the Wall Thimble
(with shield inside wall) in the framed opening of the outside wall. Be sure to seal
the flange of the Wall Thimble around the wall by using a non-hardening waterproof
sealant. Attach the back portion of the Wall Thimble to the outside wall using at least
(4) 8-penny nails or (4) #8, 1-1/2" wood screws. Depending on the thickness of
your wall, you will need to adjust the shield extension to insure that you have a
continuous shield throughout the wall penetration. You may field-fabricate a longer
extension tube if needed. Adjustments can be made by sliding the extension in or
out of the back portion of the shield. Verify that the shield extension reaches the
CHIMNEY
SECTION
TEE BRANCH
(MUST PENETRATE
A MINIMUM OF 6
INCHES INTO
ROOM)
CHIMNEY TEE
WALL THIMBLE
ASSEMBLY
USE 8-PENNY NAILS OR #8, 2-1/1"
WOOD SCREWS. USE 4 FOR EACH
SUPPORT LEG.
TEE SUPPORT IS ADJUSTIBLE TO
ALLOW FROM 2"-6" CLEARANCE
FROM CHIMNEY TO WALL
TEE CAP
Fig 24
FINISHING COLLAR
17
17
Fig 25
INSIDE
WALL
THIMBLE
COVER
PLATE
OUTSIDE
CHIMNEY
TEE
FINISHING
COLLAR
TEE BRANCH
(MUST EXTEND
AT LEAST 6
INCHES INTO
ROOM)
SHIELD
EXTENSION
BACK OF WALL
THIMBLE (SECURE
WITH 4 NAILS OR 4
SCREWS)
front cover plate when the cover plate is in position. Do not install cover plate at
this time. When the shield extension is in position, secure it to the back portion of
the shield using (4) sheet metal screws (Fig 25).
4. Install Tee Support: Install the Tee Support on the outside wall. Position Tee
Support so that the chimney Tee will be centered inside the Wall Thimble (Figs 24,
25, & 26). The Tee Support may be installed either above the Tee or below the
Tee as seen in Figure 26. Important: Verify that Tee Support is level, and secure
the leg brackets of the Tee Support to the wall using (4) #8, 2-1/2" screws for each
side. Slide support base over leg brackets to adjust for desired clearance to wall,
and secure by tightening bolts. (Figs 26 & 27).
5. Install Tee and Cleanout Chimney Section: Twist lock the Tee onto a
desired length of Chimney to be used as the cleanout section. Use only one chimney
section (any length) to attach to bottom of the Tee. Tighten support band around
INSTALLATION
WITH TEE BELOW
TEE SUPPORT
(SHOWN WITH LEG
BRACKETS
MOUNTED ABOVE
SUPPORT PLATE)
TEE SUPPORT MAY BE INSTALLED
WITH LEG BRACKETS ABOVE OR
BELOW SUPPORT PLATE AS SHOWN
ADJUSTABLE WALL
STRAP - ALLOWS 2"-6"
CLEARANCE TO WALL
8-PENNY NAILS OR
#8, 2-1/2" WOOD
SCREWS - 2 PER SIDE
ADJUSTABLE TEE
SUPPORT ALLOWS 2"-6"
CLEARANCE TO WALL
Fig 26
8-PENNY NAILS OR #8, 2-1/2"
WOOD SCREWS - 4 PER SIDE
CLEANOUT CAP
18
INSTALLATION
WITH TEE ABOVE
TEE SUPPORT
(SHOWN WITH LEG
BRACKETS
MOUNTED BELOW
SUPPORT PLATE)
USE (4) 1/2" SHEET
METAL SCREWS
TO SECURE BAND
AROUND CHIMNEY
USE 1/2" SHEET
METAL SCREWS
TO SECURE BAND
TO SUPPORT BASE
EXTENDED ROOF
chimney section at proper height to insure
SUPPORT
BRACKET
that Tee is centered through Wall Thimble
ADJUSTABLE
(Fig 25 & 26). Use the 1/2" sheet metal
WALL STRAP
screws provided to insure a tight connection
ADJUSTABLE
2 INCHES
between support band and chimney
FLASHING
MINIMUM
section. Connect support band to support
base using the 1/2" sheet metal screws
provided (Fig 26). Twist lock Tee Cap
2 INCHES MINIMUM
6 INCHES
MINIMUM
into bottom of Chimney Cleanout section. INTO
FRAMED CHASE
ROOM
ADJUSTABLE
6. Install Branch onto Tee: From inside
TEE SUPPORT
the house, attach the Chimney Branch (a
ACCESS DOOR
FOR CLEANING
12" or 18" Chimney section, depending on
wall thickness, positioned horizontally used
Fig 27
to pass through the wall) to the Tee by twist
locking it clockwise. Important: The Chimney section used to penetrate through the
wall must extend at least 6" into the room (Fig 25 & 27). Use high-temperature
sealant (500OF) to seal between the Wall Thimble and the Chimney on the outer
wall.
7. Install Cover Plate and Finishing Collar: After the Chimney Branch is
secured in place (penetrating at least 6" into the room), slide the Cover Plate over
the Branch and attach it to the framing using (4) 1-1/4" long, round head wood
screws. Be sure that the Branch is centered in the opening of the Cover Plate. Twist
lock the Finishing Collar on to the female end of the Chimney Branch by twisting
clockwise.
8. Complete Chimney: Attach the Chimney Sections as in Step 7 in the Ceiling
Supported Installation section (page 8). Secure the chimney to the wall with Wall
Straps at a minimum of 8-foot intervals and maintain at least 2 inches of clearance
to combustible materials. The Wall Straps are adjustable to allow from 2"- 6"
clearance to combustibles. Slip the Wall Straps around the chimney, tighten the
bolts, adjust the clearance, and fasten the Wall Straps to the wall with (4) #8, 1-
Fig 28
ALLOW A MINIMUM
OF 2 INCHES AIR
SPACE ON ALL SIDES
2 INCHES MINIMUM
2 INCHES MINIMUM
19
19
1/2" long wood screws. Once the chimney is at the minimum height specified in
Figure 1, attach the Chimney Cap onto the top of the chimney by holding it by the
collar and twist locking it clockwise onto the Chimney Pipe. If the chimney
penetrates an overhang, frame for at least 2 inches of clearance, and install Flashing
and Storm Collar as described in Steps 9 & 10 for Ceiling Supported Installations
(page 9). Another option is to cut away the overhang for a 2-inch clearance (Fig
28). If the chimney extends more than 5 feet above the top Wall Strap or Flashing,
use an Extended Roof Support Bracket (See page 11).
9. Install Chase Top Flashing: It is recommended that a Tee Supported
Chimney be enclosed in a chase. If a chase enclosure has been constructed, you
can either use a standard flat-roof flashing, or you can use a Chase Top Flashing.
Using a Chase Top Flashing allows for a lower profile for the chimney. The Chase
Top Flashing has an opening that is 3" larger in diameter than the DuraTech
Chimney. If the Chase Top Flashing can fit over your chase enclosure as required
(Fig 29) then install as directed, or trim as needed. However, if the Chase Top
Flashing is smaller than your chase enclosure, you will need to provide a galvanized
sheet capable of covering your chase and overhanging the sides by 1/2 - 3/4 inch.
Attach the Chase Top Flashing to the galvanized sheet using appropriate sheet metal
screws and non-hardening waterproof sealant. Use the Chase Top Flashing
ALLOW A 1 INCH AIR
Spacers to allow the proper air-gap clearances
GAP BETWEEN
STORM COLLAR AND
on the galvanized sheet. The Chase Top FlashCHASE TOP FLASHING
ing Spacers are available to insure that the
3/8 INCH AIR SPACE
ESTABLISHED BY
SPACERS
CHIMNEY
CAP
STORM
COLLAR
CHASE TOP
FLASHING
1/4 INCH
AIR
SPACE
CHIMNEY
SECTIONS
SPACER
3/8 INCH
6 INCH MINIMUM
CLEARANCE
BETWEEN BOTTOM
OF CAP AND CHASE
TOP FLASHING
FRAMED CHASE
ENCLOSURE
1/4 INCH
Fig 29
20
proper air-gap is maintained. Figure 29 displays in some detail, how these air gaps
are established using the Spacers and Chase Top Flashing. Secure the Chase Top
Flashing to the chase using a sufficient number of #8, 1-1/2" wood screws, being
careful to insure the air gap is maintained between the flashing and the chase. Seal
the screw heads with non-hardening sealant. When installing the Storm Collar,
allow a 1" air space between the bottom of the Storm Collar and the Chase Top
Flashing .
MASONRY FIREPLACE INSTALLATIONS
1. Determine Chimney Size: Use Table 4 to determine the correct diameter
chimney for your fireplace.
2. Mount Anchor Plate: Chimneys for masonry fireplaces begin with an Anchor
Plate. Make sure the surface of the masonry chimney has a level surface on which
to attach the Anchor Plate. If the top of the masonry does not have a level surface,
then you will need to modify the masonry accordingly. Center the Anchor Plate over
the masonry flue opening, and seal the Anchor Plate with a high-temperature
(1000OF) sealant. Secure Anchor Plate with (4) 1/4" x 2" masonry anchors (Fig
30). It is very important that the Anchor Plate is level. Be sure to maintain a 1" min.
clearance to combustibles from the Anchor Plate.
3. Attach Chimney: Twist lock the first Chimney Section clockwise onto the
Anchor Plate.
Table 4
EXAMPLE SHOWS FIREPLACE OPENING AS 36 INCHES WIDE,
30 INCHES HIGHT, AND THE CHIMNEY HEIGHT AS 20 FEET.
tHE CORRECT FLUE SIZE FOR THE SAMPLE PROBLEM IS 12
INCH DIAMETER CHIMNEY.
CHIMNEY
HEIGHT
FIREPLACE
OPENING
WIDTH
FIREPLACE
OPENING
HEIGHT
DOTTED LINE REPRESENTS SAMPLE PROBLEM
21
ANCHOR
PLATE
MAINTAIN 1-INCH MIN.
CLEARANCE FROM ANCHOR
PLATE TO COMBUSTIBLES
MASONRY
ANCHOR BOLTS
(4) REQUIRED
(NOT
FURNISHED)
HIGH
TEMP
SEALANT
Fig 30
EXISTING
MASONRY
CHIMNEY WITH
LEVELED SURFACE
CHIMNEY
SECTION
SHEET
METAL
SCREWS (4
REQUIRED)
ANCHOR
PLATE
Fig 31
4. Finish Chimney: Install the rest of the chimney as directed in the Ceiling
Supported Installation section, Steps 4 through 10 (page 7). Refer to Figure 1 and
Table 4 for chimney height requirements. Always maintain at least 2 inches of
clearance to combustible materials, and enclose the chimney where it passes
through occupied areas. Use a Wall Strap for every eight (8) feet of chimney height.
ZERO-CLEARANCE FIREPLACE INSTALLATIONS
1. Manufacturer’s Instructions: Carefully read and comply with the
manufacturer’s installation instructions for your fireplace. Be sure that DuraTech
is approved for use with your appliance.
2. Anchor Plate: Attach an Anchor Plate to the fireplace top with (4) 5/8" sheet
metal screws (Fig 31). Check with the appliance manufacture about the use of high
temperature sealants.
3. Chimney Sections: Attach a Chimney Section to the Anchor Plate by twistlocking clockwise.
4. Completion: Install the remainder of the chimney as instructed for a standard
Ceiling-Supported installation, (using a Firestop Radiation Shield in the 1st
floor ceiling instead of the Support Box). Always maintain at least 2 inches of
clearance to combustibles, and enclose the chimney where it passes through
occupied areas.
CONNECTION FROM APPLIANCE TO CHIMNEY SYSTEM
1. Single Wall Stovepipe: If single wall stovepipe is desired, Simpson DuraVent’s “Dura-Black” single-wall stovepipe is recommended. The connection to
the Ceiling Support Box, or Finishing Collar is made with a Dura-Black Slip
Connector or a Snap-Lock Adapter. The beaded end of the Slip Connector or
22
Snap Lock Adapter slips into the opening in the Ceiling Support or Finishing Collar.
Align the tabs on the Slip Connector or Snap Lock Adapter with the notches in the
face of the Support Box or Finishing Collar, push it in and rotate to lock it in place.
Further instructions for assembling Dura-Black Stovepipe are contained in their
shipping cartons. Remember, the minimum clearance to combustibles for single
wall stovepipe is 18 inches.
2. Close Clearance Connector Pipe (DVL): Simpson Dura-Vent manufactures
a close clearance connector pipe, also referred to as “DVL”. DVL may be
positioned as close as 6 inches to a combustible wall, and as close as 8 inches to
a combustible ceiling, provided the appliance installation instructions permit this
distance. In order to join this type of connector to the Support Box or Finishing
Collar, a DVL Adapter is required. The DVL Adapter slips into the opening in the
Support Box or Finishing Collar. Align the tabs on the DVL Adapter with the slots
cut into the face of the Support Box or Finishing Collar, and push it in, and rotate
to lock it in place. Detailed instructions for assembling the remainder of the close
clearance system are included in the DVL shipping cartons.
3. Connection to Oil-Burning Appliance: DVL is especially recommended for
oil appliances because of the corrosive nature of oil-burning exhaust. When
connecting to an oil burning appliance, refer to National Fire Protection
Association Standard #211. Table 6-5.1.1 in NFPA 211 states that you must
allow for 18" clearance to combustibles if you are using single wall vent
connector. If , however, your appliance is Type-L Vent listed and you are using
a listed Type-L Vent connector, then you are permitted to use the clearances as
specified by the vent listing.
CHIMNEY MAINTENANCE
1. Creosote and Soot: When wood is burned slowly, it produces tar and other
organic vapors, which combine with expelled moisture to produce creosote.
The creosote vapors condense in the relatively cool chimney flue of a slow-burning
fire. As a result, creosote residue accumulates on the flue lining. When ignited, this
creosote makes an extremely hot fire.
2. Access: Chimneys must be installed so that access is provided for inspection
and cleaning.
3. When to Clean: The chimney should be inspected at least once every month
during the heating season to determine if creosote or soot has built up. Check spark
arrestor screens at least every 2 to 4 weeks. If creosote or soot has accumulated,
it should be cleaned or replaced to reduce the risk of chimney fire.
23
4. How to Clean: Have your chimney cleaned by a professional chimney sweep
if you have doubts about your ability to clean it. Use a plastic, wood, or steel brush.
Do not use a brush that will scratch the stainless steel liner of your chimney. Scrub
the spark arrestor with a wire brush. To remove the Chimney Cap for cleaning,
either twist counter-clockwise to remove the entire cap, or unscrew the four (4)
screws that attach the cap’s support legs to the cap base. The Tee Cleanout Cap
can be removed by turning counter-clockwise. Be sure to replace Tee Cleanout
Cap when you are finished cleaning the chimney.
5. Coal: To reduce corrosion in chimneys where coal is burned, clean the chimney
thoroughly within 48 hours of shutting down the stove for the season.
6. Chemical Cleaners: Use chemical cleaners only as a last resort, and use only
those which the manufacturer specifically warrants as being noncorrosive to the
chimney liner. Simpson Dura-Vent will assume no liability for damage resulting from
the use of chemical cleaners.
7. In Case of Fire: If a flue fire occurs, close all appliance air inlets, and call your
Fire Department. Do not use the chimney again, until it has been inspected for
possible damage.
8. Painting: As an option, you can coat all exterior metal parts, with the exception
of the Chimney Cap, with high temperature, rust proof paint. Wash the metal with
a vinegar and water solution before painting. Painting the chimney will help to
increase chimney life.
9. Creosote Formation: Simpson Dura-Vent assumes no liability for any
structural damage or roof contamination as the result of creosote formation. It is
the owner’s responsibility to comply with inspection and cleaning requirements as
described in these instructions, and those of the appliance manufacturer.
10. Warranty: Simpson Dura-Vent proudly offers a limited lifetime warranty on
DuraTech Chimney components. The warranty includes all components except
chimney caps, which are warranted for 5 years. For specific details, refer to the
printed warranty included in the Chimney Product Catalog. Dura-Vent, DuraTech
Chimney, DVL, Close Clearance Connector, and Dura-Black are the registered
trademarks of Simpson Dura-Vent Co., Inc.
SIMPSON DURA-VENT, INC
PO Box 1510
(800)-835-4429
Vacaville, CA
(707)-446-4740 (FAX)
95696-1510
Vicksburg, MS
Visit us on the Web at
www.duravent.com
24
Feb 2002
L150